Restoration of acidic mine spoils with sewage sludge: II measurement of solids applied
Sewage sludge was incorporated in acidic strip mine spoils at rates equivalent to 0, 224, 336, and 448 dry metric tons (dmt)/ha and placed in pots in a greenhouse. Spoil parameters were determined 48 hours after sludge incorporation, Time Planting (P), and five months after orchardgrass (Dactylis glomerata L.) was planted, Time Harvest (H), in the pots. Parameters measured were: pH, organic matter content (OM), cation exchange capacity (CEC), electrical conductivity (EC) and yield. Values for each parameter were significantly different at the two sampling times. Correlation coefficient values were calculated for all parameters versus rates of applied sewage sludge and all parameters versus each other. Multiple regressions were performed, stepwise, for all parameters versus rates of applied sewage sludge. Equations to predict amounts of sewage sludge incorporated in spoils were derived for individual and multiple parameters. Generally, measurements made at Time P achieved the highest correlation coefficient and multiple correlation coefficient values; therefore, the authors concluded data from Time P had the greatest predictability value. The most important value measured to predict rate of applied sewage sludge was pH and some additional accuracy was obtained by including CEC in equation. This experiment indicated that soil properties can be used to estimate amounts of sewage sludge solids required to reclaim acidic mine spoils and to estimate quantities incorporated.
- Research Organization:
- Southern Illinois Univ., Carbondale
- OSTI ID:
- 6539946
- Journal Information:
- Reclam. Rev.; (United States), Journal Name: Reclam. Rev.; (United States) Vol. 3:3; ISSN RERED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010800 -- Coal
Lignite
& Peat-- Waste Management
510500* -- Environment
Terrestrial-- Site Resource & Use Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADDITIVES
BUILDINGS
COAL MINES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
GREENHOUSES
HARVESTING
INFORMATION
LAND RECLAMATION
MATHEMATICS
MINES
MINING
NUMERICAL DATA
PH VALUE
PHYSICAL PROPERTIES
REGRESSION ANALYSIS
REVEGETATION
SEWAGE
SEWAGE SLUDGE
SOILS
SOLIDS
SPOIL BANKS
STATISTICS
SURFACE MINING
WASTES
YIELDS